Safety device for window sashes



Jan. 1, 1929. 1,697,724l

J. J. GILROY SAFETY DEVICE FOR WINDOW SASHES Filed Dec. 15, 1926 Patented Jan. l, 1929. l.

UNITED sierras PATENT oF FICE- JAMES J.e1LRoY, or KULPMONT, rnNNsYLvANrA, AssIGNoaoF ONE-HALF To f FRANK s. WYDRA, or KULrMoNT, PENNSYLVANIA` SAFETY DEVCE FOR WINDOW SASHES.

Application filed December 13, 1926. SerialV No.`1574,504.

This invention relates to awindow fastener or safety device, and particularly to an at- Y tachment which will prevent a window sash from being opened to a greater distance than a predetermined extent. v

' The primary object of the improved fastening means is to obstruct opening a window to such an extent as to permit 'ingress'through the cleared open yspace and provide for. ventilation and yother airing advantages with safety,- and preclude all possibility of ma# nipulation of the attachment by unauthorized persons as to prevent manipulation of the parts ofthe'attachment to increase the size of the cleared opening, but readily controllable from the interior side of the sash i'by proper persons to effect a release which will permit free movement of the sash as maybe desired. 4

A further object of the invention isto provide an attachment of the class specified capable of being easily applied in operative position with a minimum of expense of-time, labor and cost of equipment.

With these'and other objects and advantages in view, the invention consists in the preferred construction and arrangement of parts which will be more fully hereinafter described and claimed.

In the drawing Figure 1, is a sectional side elevation of a part of a window sash and frame showing the improved fastener attachment applied thereto.

Figure 2, is an edge elevation of a portion `of a window frame showing a part of the improved attachment applied thereto.'

Figure 3, is an edge elevation of a portion of a window sashshowing the remaining part of the attachment applied thereto. Y

Figure 4, is a horizontal section on the line 4-4 of Figure 1.

Figure 5, is a longitudinal vertical section of the look part of the improved attachment. Figure 6, is a detail perspective view of the bolt forming part of the lock.

The improved attachment is shown with the lock part or member applied to the sash, and the striker plate attached to the window frame at a suitable elevation, but it ywilll be understood that these parts may be reversed, or, the lock member may be applied to the window` frame and the striker plate to the sash. Moreover, the specific form of lock, which will be hereinafter described, may be modified, and it will be understood that they invention is not limited to any specic form of look so` long as it embodies the essentiall part, Vwhich is a catch bolt hereinafter referred `to as a preferred construction..

The essential parts of the improved attachment comprise a look aand a striker plate 6, which as shown, are respectively applied to the window sash and window frame. The striker plate is of suitable thickness and-is inset in the window frame and held by suit-f able fastening devices' 6a, said striker plate being formed with a vertical slot 7 having an enlargement 8 at its lower extremity. The slot 7 with its lower enlarged extremity 8 is applied over lan elongated recess 7a formed in the window frame. The sash, for convenience, is indicated byA and the frame by B, and do not have to be modified in their' essenf tial structural features to accommodate the application of ment. f l

The lock 5 comprises an enclosed casing 9 with a face flange'l() located adjacentto the outer edge of the sash A. The flange 1.0 extendsfabove and below the upper and lower ends of the casing 9, as clearly shown by Fig. 5, and located inthe upper, part of the said casing 9 is a horizontal bolt l2, comprising a longitudinally extending guide member 14 the improved fastener attachand a lower catch member 15,.,whichis shorter than the member 14 and has a depending shoulder 16y for engagement by the bit 16* of a key-16", which-is inserted inVand-withdrawn from the lock through themedium of. a suitable `key hole as in ordinary structures of this class. The bolt 12 is normally forced outwardly vby al spring 12a,which bears at its outer extremity against a connecting web 17 between the outer ends of` the 'members 14 and 15 and at itsv rearv extremity against the rear side of the lock casing 9. The members 14 and 15 are intcgrallyformed with a head-plate 18 movable through an opening 13 in the outer side of the look casin`g`9, the spring 12a bearingy against the said Y web 17. Extending outwardly from the head-plate 18 is a `T`head 19, which is of such dimensions as to fit within the slot 7ad of the striker plate 6, the lower enlarged extremity 8 of the said slotpermitting the head 19 to its lower enlargement 8 after the key 16b is withdrawn from the lock and held in possession of an authorized person, andhence thesaid T-head 19 will be in position continually engage the slot 7 and its lower enlargen'ient 8,and when the lock is thus set and the bolt'12fhel`d in projected position the T- h''adl9will slideor move in the slot 7. lVhenf the partsiare properlyT assembled, as shown,

the'fT-portion19aof the head lies within the reci-issy 7 a, and the neck 19b of the said head 19 is?` free to" slide in the slot 7 of the striker plate 6'.Y The enlarged lower extremity 8 has upper4r innerfconvergedwallsSa, which rreniove'any"l possibility of the head 19 catching orbe-ing checked in its free action by projectingfangular shoulders, and these inwardly inclined walls 8a also serve as guides for centeringhthe-sa'id-fhead 19 relatively to the slot 7fof the striker plate.

:Wh'en the sashVAi's regularly and operatively 'mounted in, the frame B, the two essential'parts of the attachment consisting of the lock 5 and striker plate 6, will be located iiiclose engagingV relation, with the` T -head 19 of the bolt 12 in the slot 7 of the plate 6 if the'sash 8 is opened, or,.v\.1ithsaid T-head located in the' lower enlarged eiitremity 'Soif Vtheslot 7 if the sash is closed.` When the T- head 19 is in engagement with the slot 7 of the plate 6the sash A may `be-moved vertically within the limits allowed by the attach- V inent. When thebolt 12 is withdrawn so that theT-head 19 is disengaged from the 'plate '6 throughthe key 16b`by an authorized opervatorxth'e sash 8 may be freely moved upwardand "downwardly, or, a greater distance `than permitted by the striker plate when norm'allyiengaged by the T-head,to thereby-open the sash a greater distance, 'or give 'a larger clearance: l, Y' f W Then",`however, the T-hefad 19 is'in engagement with thestriker platel 6, or,'with` the s`lotf7 and the lower enlarged extremity 8 of said slot, it is proposed to have a clearance opening of such dimensions as will prevent the entrance ofa person, or unauthorized individual from the exterior side of the sash through the window frame, and any attempt by an unauthorized person to tamper with the bolt 12 and disengage the T-head`19 from the striker plate will be defeated in view of the fact'that it will be ldiincult to reach the key holeof the lock, and moreover, theV form of key required will not be ordinarily understood or known to said unauthorized persons.

It will also be Very diflicult to'hold t-he T- head '19 disengaged from: the strik-er plate 6 for the'purpose of freelyopening the sash from the exterior side of the latter, and, as

a consequence the improved attachment embodying the essential features respectively carried bythe sash and frame will serve as a safety means and obstruct'opening 'or' raising` the sash a greater distance than that predetermined to give-a minimized clearance or opening of such dimensions as to prevent entrance through a` sash from the exterior of the window frame by an unauthorized person. Consequently, the window sash A' can be opened and left in open condition with safety for Ventilating purposesV andV without s liability' of change of position when the T- head 19 of the bolt 12 is operatively associatedwith the slot'and lower enlarged eX- tremity 8of a plate 6.l 1 rg. It is proposed to use a key with a bit that will be-of vsuch formt' as `will not ordinarily-be accessible to an unauthorized person and it e fobvious that other'` changes in View of the ordinary safety construct-ion of locks generally maybe adopted without in ,the least departing from thespirit'of the invention. i

What is claimed is 1 V; l, *15A safetyattachment for awindowfsash and frame, .comprising a fiat plateffor insertion .in 4an lelongated recess in one of said parts with one of its faces flush with ,the surface ofthe said partover the-recess therein, said platehaving an unbroken longitudinal slotl narrower than the-recessin whi'ehthe plate vis inserted and said slotbeing enlargedk at its lower end,; and a lock for vattachment to the other part, said lock havingr a keyjoperated bolt from which projects an `outer locking T-head litted and movable in said slotand recess and shaped to retain' its association with the slotland'reces's until itis withdrawn from the lowerv enlargement of the slot by operation of the bolt', the lower 'portion of the body of the bolthaving'a depending key-engaging projection,y the 'plate at the lower enlarged end of the slotlbeing .clear of 'structural ,project-ioni and the T- head remaining -in 1' operative association with the plate until manually withdrawn.

2. A safety attachmentfor arwindowjsash and frame, said attachment comprisin'gjaflat plate'for insertion 'inl an-elongated` recessin a side of one of` said members with one dof its faces flush with the surface :of said part and adapted tov be secured over said recess, f

said plate having an unbroken longitudinal slot thereinwith a lower vterminal enlargement, and a lock for attachment toftheother window part and V having a key o e'rated7 bolt from which projects an outer T.-s iapedflocking head fittedv and movable insaid slot and withdrawable from the plate through the enlargement of the slot in the l'atterby manual" retractile operation ofthe bolt, 'the lower portionof the bolt within its'4 window part being provided with a lowerv depending` Irear `key engageable proj ection,the upper portion of the side walls of the enlargement of the slot converging toward the main portion of the slot to provide guide means and forming stop shoulders which restrict the withdrawal of the Thead until the latter reaches the lower terminal larger portion of the enlargement.

3. A safety attachment for a window sash and frame, said attachment comprising a ilat plate for insertion in a side recess in one of the Window parts flush with the surface of said part and adapted to be Xed over the said recess, the plate having an unbroken lon- `gitudinal slot therein with a lower terminal enlargement, and a lock having a casing for insertion in a recess in the other Window part and having an outer T-head projecting from slotted to provide an upper guide member` and a lower catch member spaced from the guide member to engage a part' of the lock Casing and also engageable by a key, and a spring engaging in the slot between the guide and catch members. v

In testimony whereof I have hereunto set my hand.

JAMES'J. GILRoY. 

